import wtforms
from wtforms.validators import Email, Length, EqualTo,InputRequired
from models import UserModel, EmailCaptchaModel
from exts import db


class RegisterForm(wtforms.Form):
    email = wtforms.StringField(validators=[Email(message='邮箱格式错误')])
    captcha = wtforms.StringField(validators=[Length(min=4, max=4, message='验证码格式错误')])
    username = wtforms.StringField(validators=[Length(min=3, max=20, message='用户名格式错误')])
    password = wtforms.StringField(validators=[Length(min=6, max=20, message='密码格式错误')])
    password_confirm = wtforms.StringField(validators=[EqualTo('password', message='两次输入的密码不一致')])

    # 自定义验证：
    # 邮箱是否已经被注册
    def validate_email(self, field):
        email = field.data
        user = UserModel.query.filter_by(email=email).first()
        if user:
            raise wtforms.ValidationError(message='邮箱已经被注册')

    # 验证码是否正确
    def validate_captcha(self, field):
        captcha = field.data
        email = self.email.data
        captcha_model = EmailCaptchaModel.query.filter_by(email=email, captcha=captcha).first()
        if not captcha_model:
            raise wtforms.ValidationError(message='邮箱验证码错误')

class LoginForm(wtforms.Form):
    email = wtforms.StringField(validators=[Email(message='邮箱格式错误')])
    password = wtforms.StringField(validators=[Length(min=6, max=20, message='密码格式错误')])


class QuestionForm(wtforms.Form):
    title = wtforms.StringField(validators=[Length(min=3, max=100, message='标题长度在3-100之间')])
    content = wtforms.StringField(validators=[Length(min=5, message='内容至少需要5个字符')])


class AnswerForm(wtforms.Form):
    content = wtforms.StringField(validators=[Length(min=5, message='内容至少需要5个字符')])
    question_id = wtforms.IntegerField(validators=[InputRequired(message='必须指明属于哪个问题')])